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<Title>Custom Scatter Symbols</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Custom Scatter Symbols</p>
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<img src="images/scattersymbols.png" width='450' height='400'>
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This example demonstrates using external image files as scatter symbols.<br><br>
The chart in this example is created as 5 scatter layers using <a href="XYChart.addScatterLayer.htm">XYChart.addScatterLayer</a>, with each layer containing one point.<br><br>
The symbols for the scatter layers come from external image files. They are loaded using <a href="DataSet.setDataSymbol2.htm">DataSet.setDataSymbol2</a>.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/scattersymbols.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// The XY points for the scatter chart
double[] dataX = {200, 400, 300, 250, 500};
double[] dataY = {40, 100, 50, 150, 250};

// The custom symbols for the points
String[] symbols = {"robot1.png", "robot2.png", "robot3.png", "robot4.png", "robot5.png"};

// Create a XYChart object of size 450 x 400 pixels
XYChart c = new XYChart(450, 400);

// Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0).
// Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
c.setPlotArea(55, 40, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1);

// Add a title to the chart using 18pt Times Bold Itatic font.
c.addTitle("Battle Robots", "Times New Roman Bold Italic", 18);

// Add a title to the y axis using 12pt Arial Bold Italic font
c.yAxis().setTitle("Speed (km/s)", "Arial Bold Italic", 12);

// Add a title to the y axis using 12pt Arial Bold Italic font
c.xAxis().setTitle("Range (km)", "Arial Bold Italic", 12);

// Set the axes line width to 3 pixels
c.xAxis().setWidth(3);
c.yAxis().setWidth(3);

// Add each point of the data as a separate scatter layer, so that they can have a different symbol
for(int i = 0; i &lt; dataX.length; ++i) {
    c.addScatterLayer(new double[]{dataX[i]}, new double[]{dataY[i]}).getDataSet(0).setDataSymbol2(
        symbols[i]);
}

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "", "title='Range = {x} km, Speed = {value} km/s'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Custom Scatter Symbols&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Custom Scatter Symbols
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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<br><hr class="separator"><div class="copyright">&copy; 2022 Advanced Software Engineering Limited. All rights reserved.</div>
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